XML schemas and PG column names

I'm doing some work with the output of query_to_xml_and_xmlschema(). The 
output is a bit unfortunate in my opinion when the column names in the 
query are not legal XML names. We quite reasonably translate the names 
so that legal XML names result, but we don't actually put the original 
name anywhere in the output, meaning that the end processor has some 
work to do to recover the original. Here are two snippets from the 
output when the column names are "z" and "25 %ile":
    <xsd:complexType name="RowType">      <xsd:sequence>        <xsd:element name="z" type="INTEGER"
nillable="true"></xsd:element>       <xsd:element name="_x0032_5_x0020__x0025_ile" type="INTEGER"
nillable="true"></xsd:element>     </xsd:sequence>    </xsd:complexType>
 
    <row>      <z>1</z>      <_x0032_5_x0020__x0025_ile>2</_x0032_5_x0020__x0025_ile>    </row>

Of course, we can recover the original name by using something like perl 
to do operations like this:
   $column_name =~ s/_x([[:xdigit:]]{4})_/pack("U",hex($1))/ge;

but that's ugly and not as simply available in many XSL processors (I am 
using XSL to transform the XML.)

I propose that we annotate the schema section RowType elements with the 
original names, so we would have something like this in the schema section:
   <xsd:complexType name="RowType"   xmlns:pg="http://www.postgresql.org/schemas/column-names">      <xsd:sequence>
  <xsd:element name="z" type="INTEGER" nillable="true">                 <xsd:annotation>                <xsd:appinfo>
                <pg:column-name>z</pg:column-name>               </xsd:appinfo>            </xsd:annotation>*   *
</xsd:element>       <xsd:element name="_x0032_5_x0020__x0025_ile" type="INTEGER"   nillable="true">
<xsd:annotation>                   <xsd:appinfo>                        <pg:column-name>25 %ile</pg:column-name>
          </xsd:appinfo>            *    *</xsd:annotation>       </xsd:element>      </xsd:sequence>
</xsd:complexType>

While it might be a bit longwinded, it's not going to add to the per-row 
output, just the schema section.

Thoughts?

cheers

andrew